Sabine Wren would be a great character to include. They have a connection in the Star Wars Rebels series, and their interactions could be further explored in fanfiction. Ezra Bridger is also a good choice. His journey and his relationship with Ashoka could be developed more. Another character could be Bo - Katan Kryze. Her Mandalorian ways and her goals could clash or align with Ashoka's, creating interesting storylines.
Ahsoka Tano is the main character. Sabine Wren also plays a significant role.
Definitely Darth Vader. His presence would create a lot of tension. He could be on a mission to hunt down the Rebels crew, and it would be a battle of wits and strength as they try to outmaneuver him.
Definitely Luke Skywalker. He could cross paths with Iden and they could have some interesting ideological battles. Leia Organa would also be a great addition. Her strong leadership and rebel spirit could contrast with Iden's Imperial upbringing. And of course, Han Solo. His roguish charm could make for some entertaining interactions with Iden.
One idea could be exploring Ashoka's time between leaving the Jedi Order and her appearance in Rebels. Maybe she meets some new and unique characters in different parts of the galaxy and has to make tough choices without the guidance of the Jedi. Another could be a story where Ashoka teams up with an unexpected ally, like a bounty hunter who has a change of heart. It could also be interesting to write a fanfiction about Ashoka's early days as a Padawan, before she became Anakin's apprentice.
Definitely include Obi - Wan Kenobi. He has a connection to Geonosis already from the movies. Anakin Skywalker would also be a great addition. And for a non - Jedi character, you could add a Geonosian rebel who is trying to overthrow the corrupt leaders on the planet.
Ahsoka Tano would be a great character to include. She's strong - willed and has a unique connection to the Force. Her presence on Mortis could bring new perspectives and her skills as a fighter would be useful in the challenges there.
Darth Maul is a great character to include. As a Sith, his menacing presence and his unique fighting style would add a lot to a Sith Pureblood fanfiction. Another one could be Count Dooku. His sophisticated and devious nature would interact well with the Sith Purebloods. And of course, General Grievous. Even though he's not a Sith, his role in the Clone Wars and his connection to the Separatists could create interesting storylines when paired with Sith Pureblood characters.
Obviously, the Senate Guards themselves are essential. Their unique armor and loyalty to the Senate make them interesting. Also, senators like Padmé Amidala can be included. Her political influence can create great storylines when interacting with the Senate Guards.
Elsa is a very popular choice. Her powerful ice - creating abilities can bring a unique element to the Star Wars universe. Another popular character is Luke Skywalker. Imagine him mentoring Elsa in controlling her powers like he was mentored in the ways of the Force. Rey is also popular as she could potentially have some kind of connection with the Frozen characters, perhaps sharing her journey of self - discovery with them.
Well, the Sith Lords in general are popular in these crossovers. Their use of the dark side of the Force and their power - hungry nature can create some intense storylines. And from other universes, characters like Captain Kirk could be included. His exploration - based mindset would clash with the Empire's more controlling nature. It could lead to some great moments of conflict and cooperation as he tries to navigate the Empire's complex politics and power dynamics.